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PAIP.MYSQL SLEEP 连接太多解决
////////服务器端方法.
-----------------设置mysql自动断开.sleep连接..
MySQL中的配置参数interactive_timeout和wait_timeout(可能导致过多sleep进程的两个参数)
1)interactive_timeout:
参数含义：服务器关闭交互式连接前等待活动的秒数。交互式客户端定义为在mysql_real_connect()中使用CLIENT_INTERACTIVE选项的客户端。
参数默认值：28800秒（8小时）
(2)wait_timeout:
参数含义：服务器关闭非交互连接之前等待活动的秒数。
在线程启动时，根据全局wait_timeout值或全局interactive_timeout值初始化会话wait_timeout值，取决于客户端类型(由mysql_real_connect()的连接选项CLIENT_INTERACTIVE定义)。
参数默认值：28800秒（8小时）
--------------------已经连接上的使用kill掉..
paip.mysql 批量kill 连接.（2013-12-19 09:28）
/////////////客户端方法.
conn并不能自己疏放.除非使用连接池
------------c3p0 数据库池 timeout 设置..minConn=0
7: //Maximum idle time for C3P0 connection pool
8: public static final String C3P0_TIMEOUT = "hibernate.c3p0.timeout";
--------------------手动conn.close
要是没有使用池,只能手动close了..没有参数设置conn的最大时间..
-----------进程结束...自动疏放gc conn
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